git-buildpackage not producing *.source.changes files

[Carlos Borroto <carlos.borroto@gmail.com>]

Hi,

I'm trying to upload a package to my PPA, as a way to get more
familiar with the workflow. I got stuck trying to produce a source
only package with git-buildpackage. I'm passing the options '-S -sa':
$ git-buildpackage --git-debian-branch=oneiric-ppa -S -sa

But this doesn't produce the *.changes files in my build area or
anywhere I could find it. This is my ~/.gbp.conf:
[gbp-pull]
pristine-tar = True

[DEFAULT]
builder = git-pbuilder
cleaner = fakeroot debian/rules clean
pristine-tar = True

[git-buildpackage]
export-dir = ../build-area/
tarball-dir = ../tarballs/

[git-import-orig]
dch = False

Is there something I'm missing?

Thanks,
Carlos